Joint variation:
[tex]y=k\cdot x\cdot z\cdot w[/tex]
Procedure:
0. We have to calculate the value of ,k ,with the first given values.
[tex]144=k\cdot2\cdot6\cdot6[/tex]
2. Simplifying:
[tex]144=k\cdot2\cdot36[/tex][tex]144=k\cdot72[/tex][tex]k=\frac{144}{72}[/tex][tex]k=2[/tex]
3. Finally, we find y using the second values given now that we now k.
[tex]y=2\cdot6\cdot1\cdot1[/tex]
Answer: y = 12
